SS Libau

Libau (pronounced [lɪˈbaʊ]; also known as SS Castro) was a merchant steam ship. In 1916 it masqueraded under the cover name of Aud ([ʔaʊ̯d]) in an attempt to carry arms to Ireland as part of the preparation for the Easter Rising.

Vessel

SS Castro was a 1,062 ton steam cargo transport built for the Wilson Line of Hull, England in 1907. Castro measured 220 feet (67 m) in length with a beam 32 feet (9.8 m) and a draught of 12 ft (3.7 m). The ship was captured by the Imperial German Navy in the Kiel Canal, at the beginning of World War I in August 1914. Renamed Libau (the German name of Liepāja), she remained inactive until 1916, when designated as the vessel to carry a cargo of arms to Ireland, to aid the Easter Rising, and given the name Aud.

Smuggling operation

Masquerading as SS Aud —an existing Norwegian vessel of similar appearance— Libau set sail from the Baltic port of Lübeck on 9 April 1916, under the Command of Karl Spindler, bound for the south-west coast of Ireland. Under Spindler was a crew of 22 men, all of whom were volunteers. Libau/Aud, laden with an estimated 20,000 rifles, 1,000,000 rounds of ammunition, 10 machine guns, and explosives (under a camouflage of a timber cargo), evaded patrols of both the British 10th Cruiser Squadron and local Auxiliary patrols.